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Wuenscher, H. F.

Publications and source records attributed to Wuenscher, H. F..

13 records
All sourcesNASA NTRSDOE OSTI
NASA NTRS1973

Materials processing in zero gravity

Manufacturing processes which are expected to show drastic changes in a space environment due to the absence of earth gravity are classified according to (1) buoyancy and thermal convection sensitive processes and (2) processes where molecular forces like cohesion and adhesion remain as the relatively strongest and hence controlling factors. Some specific process demonstration experiments carried out during the Apollo 14 mission and in the Skylab program are described. These include chemical separation by electrophoresis, the M551 metals melting experiment, the M552 exothermic brazing experiment, the M553 sphere forming experiment, the M554 composite casting experiment, and the M555 gallium arsenide crystal growth experiment.

Wuenscher, H. F.↗
NASA NTRS1972

Manufacturing in space.

Space, in contrast to earth, offers total gravity control and unequaled vacuum, temperature, pressure, and radiation characteristics. In zero-g molecular forces such as cohesion and adhesion become controlling factors even in the largest bulk processes. The absence of relative mass accelerations eliminates the need for support of solid matter. Stability in liquid-solid, liquid-liquid, or liquid-gas mixtures, and the absence of thermal convection is obtained because there is no relative motion in fluids due to differences in density. Applications of these characteristics include liquid-matrix preparation of composites, fine-grain castings, supersaturated alloys, combinations which exhibit liquid-phase immiscibility, the containerless free suspension of materials, surface-tension casting, surface-tension drawing, adhesion casting, and controlled density casting.

Wuenscher, H. F.↗
NASA NTRS1970

Manufacturing in space

Skylab Orbital Workshop fabrication experiments under space environment conditions, discussing weightlessness and vacuum effects on various manufacturing techniques

Wuenscher, H. F.↗
NASA NTRS1970

Serpentuator Patent

Internal and external serpentine devices for performing physical operations around orbital space stations

Wuenscher, H. F.↗
NASA NTRS1968

Conceptual hermetically sealed elbow actuator

Electrically or hydraulically powered, hermetically sealed angular or rotary actuator deflects mechanical members over a range of plus or minus 180 degrees. The actuator design provides incremental flexures which keep the local deflection rate within elastic limits.

Wuenscher, H. F.↗
NASA NTRS1967

Low and zero ''G'' manufacturing in orbit.

Zero gravity orbital manufacturing noting free fall casting and blowing and zero gravity surface tension casting and foaming, discussing Serpentuator System engineering

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